Will these fit into my factory fog light openings without modification?

Yes. These mount directly into the original fog light cavities using factory attachment points. No drilling, cutting, or bracket fabrication required.

Do these come with bulbs already installed?

The units ship with LED elements installed and ready to wire. Connect power and ground to your existing fog light harness or run new wiring if your vehicle doesn't have a factory fog light circuit.

What's the difference between projector and reflector fog lights?

Projectors focus light into a concentrated beam with a defined cutoff line, reducing scatter and glare while improving depth perception in fog and rain. Reflectors spread light wider but with less control. Projectors are brighter and more effective for actual visibility.